JPH10185551A - Apparatus for measuring volume of golf ball dimple and small projection of mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately measure a volume of a golf ball dimple or a small projection of a mold. SOLUTION: The apparatus is provided with a measuring means 3 having a probe contact measuring device, and a moving means for moving the probe contact measuring device of the measuring means 3 in an X-axis and a Y-axis directions. In this case, the X-axis and Y-axis are orthogonal in a plan view of an optional golf ball dimple to be measured, and a X-axis is orthogonal to an X-Y plane in a section of the golf ball dimple. The probe touch-type measuring device measures an X coordinate value and a Z coordinate value. A computing means 4 obtains a sectional area for every one measurement pitch in the X-axis direction from the X coordinate value and Z coordinate value measured by the measuring means 3. The computing means 4 multiplies the sectional area by the amount of one measurement pitch in the Y-axis direction, thereby computing a volume of each small block divided by an X direction and a Y direction rows and computing a volume of the golf ball dimple from the volume of each small block.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the volume of a dimple of a golf ball and a small protrusion of a mold, and more particularly, to accurately measure three-dimensional coordinate data inside a dimple (or a small protrusion of a mold). By doing so, a more accurate volume can be measured.

[0002]

2. Description of the Related Art Conventionally, volume measurement of golf ball dimples and the like has been measured by a non-contact type shape measuring system.
That is, the dimple volume of the golf ball was measured without directly contacting the measuring device with the golf ball.

[0003]

However, in the field of golf ball dimples, which require very fine precision, the non-contact type shape measuring system as described above is insufficient in volume measurement precision. Also, in the case of measuring the volume (volume) of the small protrusion of the mold for forming dimples in the mold for manufacturing a golf ball, the non-contact type shape measuring system as described above is used, so that the measurement accuracy is high. Was missing. Accordingly, it is an object of the present invention to overcome the drawbacks of the above-described device and to provide a device having sufficient accuracy as a volume measuring device for dimples and small projecting dies.

[0004]

In order to achieve the above-mentioned object, a golf ball dimple volume measuring apparatus according to the present invention has X and Y axes orthogonal to each other in plan view of any golf ball dimple to be measured. And the X coordinate value and Z when taking the Z axis orthogonal to the XY plane in the cross section.
Measuring means having a stylus-contact measuring device for measuring coordinate values, moving means for moving the stylus-contact measuring device of the measuring means in the X-axis direction and the Y-axis direction, and measurement by the measuring means A small block divided into an X-direction column and a Y-direction column by calculating a cross-sectional area for each pitch in the X-axis direction from the X-coordinate value and the Z-coordinate value and multiplying this cross-sectional area by one pitch amount in the Y-axis direction for measurement. Calculating means for calculating the volume of the golf ball dimple by calculating the volume of each golf ball. At this time, the measuring pitch of the measuring means in the X-axis direction is set to 0.01 mm.
It is preferable that the measurement pitch of the measuring means in the Y-axis direction is 0.01 mm to 0.20 mm.

Further, the volume measuring apparatus for a small mold protrusion according to the present invention has X and Y axes orthogonal to a plan view of an arbitrary small mold protrusion to be measured and orthogonal to an XY plane in a cross section. Measuring means having a stylus contact measuring device for measuring the X coordinate value and the Z coordinate value when the Z axis is taken, and moving the stylus contact measuring device of the measuring means in the X axis direction and the Y axis direction A cross-sectional area for each measurement pitch in the X-axis direction is determined from the X-coordinate value and the Z-coordinate value measured by the moving means to be measured and the X-coordinate value and the Z-coordinate value, and the cross-sectional area is multiplied by a measurement pitch in the Y-axis direction. Calculating means for calculating the volume of each small block divided by the X-direction row and the Y-direction row to calculate the volume of the small mold protrusion. At this time, it is preferable that the measuring pitch of the measuring means in the X-axis direction is 0.01 mm to 0.20 mm and the measuring pitch of the measuring means in the Y-axis direction is 0.01 mm to 0.20 mm.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments.

FIG. 1 is a simplified block diagram of a golf ball dimple volume measuring apparatus according to the present invention. This volume measuring apparatus is orthogonal to a dimple 2 (see FIG. 5) of an arbitrary golf ball 1 to be measured in plan view. Measuring means 3 for measuring the X coordinate value and the Z coordinate value when the X and Y axes are taken and the Z axis orthogonal to the XY plane in the cross section is taken;
Calculating means 4 for calculating the volume of the dimple 2 based on the X coordinate value and the Z coordinate value measured by the measuring means 3;

[0008] Thus, the measuring means 3 uses the golf ball 1
The device has a stylus contact measuring device 5 (see FIG. 5) for measuring the unevenness of the surface of the device. That is, the measuring device 5 can move the stylus in contact with the surface of the golf ball 1, thereby measuring the X coordinate value and the Z coordinate value. Further, the moving means 6 is, for example, a cylinder for reciprocating the measuring device 5 in the X-axis direction, and a main body of the cylinder is reciprocating in the Y-axis direction to reciprocate the measuring device 5 in the Y-axis direction. A cylinder is used, and as a mechanism for reciprocating in the X-axis direction or the Y-axis direction, a screw shaft, a nut member screwed thereto, and the screw shaft are rotated around the axis thereof. It may have a motor or the like.

The calculating means 4 includes, as shown in FIG.
A first calculation unit for obtaining a cross-sectional area for each measurement pitch in the X-axis direction from the X coordinate value and the Z coordinate value measured by the measuring unit;
And each of the small blocks 12 (see FIG. 4) divided by the X-direction row 10 and the Y-direction row 11 by multiplying the cross-sectional area obtained by the first arithmetic unit 7 by one pitch amount measured in the Y-axis direction. A second computing unit 8 for computing the volume and a third computing unit 9 for computing the measured volume of the dimple 2 from the volume of all the small blocks 12 are provided. That is, as shown in FIG. 4, the sectional area (that is, the area of the XZ plane) is obtained for each small block 12, and the sectional area is multiplied by one pitch amount in the Y-axis direction to obtain the volume of one block 12. Ask for. Then, the volumes of the blocks 12 are added to determine the volume of the dimple 2.

Next, a method for measuring the volume of the dimple 2 of the golf ball 1 using the volume measuring device configured as described above will be described. In this case, the measuring device 5 is moved along the X-axis direction by the moving means 6, and the measurement is performed along the X-axis direction. Then, the measurement values measured by the measuring means 3, that is, the X coordinate value and the Z coordinate value are input to the calculating means 4 at predetermined small intervals (fine pitches) (0.01 mm to 0.20 mm). When the measurement in the X-axis direction is completed, the measuring device 5 is shifted from the X-axis direction by a minute interval (0.01 mm to 0.20 mm) in the Y-axis direction, and the measurement in the X-axis direction is similarly performed. I do. If the measurement pitch is larger than 0.20 mm, the obtained data is small and high-precision measurement cannot be performed. Conversely, if the measurement pitch is smaller than 0.01 mm, a large amount of input data is required, which is necessary to obtain the volume. It is useless because more data than data is obtained.

By the way, as shown in FIG. 2, the range of the dimple 2 to be measured in the X-axis direction is obtained by finding the point where the X-axis direction line intersects the edge of the dimple 2, and the minimum value of this point in the X-axis direction is obtained. Set the range to the maximum value. The edge is 1
If no line is detected, the process is terminated at this point.

As shown in FIG. 3, the range of the dimples 2 to be measured in the Y-axis direction is, as shown in FIG. At both edges. This is repeated until the X-axis direction range is exceeded in the X-axis left and right directions from the designated center point. The maximum value and the minimum value are obtained from all the detected Y-column edges, and this is defined as the range in the Y-axis direction. If no set of Y column edges can be detected, no error is detected and the range in the Y direction is determined to be the maximum (all edges detected in the X axis direction are employed).

Then, from the detected edges in the X-axis direction as shown in FIG. 2, only those within the Y range limited in FIG. 3 are extracted, and the corresponding dimple 2 is specified.

Therefore, the dimples determined as described above are limited to those whose edges can be determined by the X-axis direction detection. Therefore, the dimples 2 are shallow in the X-axis direction near the upper and lower (upper and lower in the drawing) edge vanishing points, and in many cases, the edge cannot be detected. This is Y
Correction is performed using the edge detected in the axial direction.

Among the Y column edges existing between the upper and lower edge sets, the first edge whose Y coordinate can be included on the corresponding Y axis coordinate is searched inward from both ends of the X column edge.
That is, the Y coordinate is included on the corresponding Y axis coordinate, and the volume is calculated by regarding the edge in the X column direction. However, if the number of edges detected on the corresponding Y axis is one or less, it is ignored. Search this both up and down.

Then, within the range in the X-axis direction and the range in the Y-axis direction, a cross-sectional area for each (measured) pitch in the X-axis direction is obtained from the X-coordinate value and the Z-coordinate value.
By multiplying by one pitch amount (measured) in the axial direction, the volume of each small block 12 divided by the X direction row 10 and the Y direction row 11 is calculated. Thereafter, the volume of the golf ball dimple 2 can be obtained by adding the volumes of the (all) blocks 12.

Therefore, if the volume is measured by the volume measuring device as described above, the three-dimensional coordinate data can be accurately measured, and the volume of each golf ball dimple 2 can be determined based on the high-precision three-dimensional coordinate data. Can be obtained, and the value of the obtained volume is highly accurate.

The volume (virtual volume) of the lid 13 (see FIGS. 6 and 7) of the dimple 2 is obtained by calculating the cross-sectional area in the cross section from the distance H between the edges and the ball diameter. (One pitch amount in the axial direction).

It should be noted that this volume measuring device can be adapted to a shape in which the Z coordinate of the position of an edge when the object to be measured (golf ball) is spherical and placed horizontally is the maximum value.

FIG. 8 is a simplified block diagram of a device for measuring the volume of a small mold projection according to the present invention. This device comprises a small mold projection 15 (see FIG. 9) of a mold 14 for forming a golf ball. Measuring means 16 for measuring the X coordinate value and the Z coordinate value when taking the X and Y axes orthogonal to each other in plan view and taking the Z axis orthogonal to the XY plane in the cross section. Based on the X coordinate value and Z coordinate value measured at
Computing means 17 for computing the volume of the data. In addition, the small mold protrusion 15 is the dimple 2 of the golf ball 1.
And a plurality of molds 14 are formed on the inner surface of the concave portion for forming a golf ball of the mold 14.

The measuring means 16 has a stylus contact type measuring instrument 18 as shown in FIG. 9, similar to the measuring means 3 described above. The moving means 19 can move in the X-axis direction and the Y-axis direction. That is, the measuring device 18 can move the stylus in contact with the inner surface of the concave portion of the mold 14, thereby measuring the X coordinate value and the Z coordinate value.

The calculating means 17 includes a first calculating section 20 for calculating a cross-sectional area for each pitch in the X-axis direction from the X coordinate value and the Z coordinate value measured by the measuring means 16, Part 20
A small block 12 divided by an X direction row 10 and a Y direction row 11 by multiplying the cross-sectional area obtained by
A second calculating unit 21 for calculating the volume of each (see FIG. 4), a third calculating unit 22 for calculating the measured volume (volume) of the small mold protrusion 15 from the volume of all the small blocks 12, Is provided.

That is, also in this case, the cross-sectional area (that is, the area of the XZ plane) is obtained for each small block 12, and the cross-sectional area is multiplied by one pitch amount in the Y-axis direction to obtain the volume of one block 12. Ask for. Then, the volume of each of the blocks 12 is added to obtain the volume of the small die 15.

Therefore, if the volume measuring device for the small projecting portion of the mold is used, the same processing as that for the above-mentioned volume measuring device for the dimple of the golf ball is performed to measure the volume of the small projecting portion of the mold 15 with high accuracy. can do.

[0025]

Since the present invention is configured as described above, the following effects can be obtained. According to the golf ball dimple volume measuring device of the first aspect, the volume of the golf ball dimple 2 can be accurately measured based on the three-dimensional data measured accurately. According to the golf ball dimple volume measuring device of the second aspect, the volume of the dimple 2 can be measured with higher accuracy. According to the volume measuring device of the small mold protrusion of the third aspect, the volume of the small mold protrusion 15 can be accurately measured based on the three-dimensional data measured accurately. According to the volume measuring device of the small mold protrusion of the fourth aspect, the volume of the small mold protrusion 15 can be measured with higher accuracy.

[Brief description of the drawings]

FIG. 1 is a simplified block diagram of a golf ball dimple volume measuring device according to the present invention.

FIG. 2 is an explanatory diagram showing a measuring method.

FIG. 3 is an explanatory diagram showing a measuring method.

FIG. 4 is an explanatory diagram showing a measuring method.

FIG. 5 is an enlarged view of a main part of the golf ball.

FIG. 6 is a simplified diagram showing a lid.

FIG. 7 is a diagram showing a method of calculating the volume of the lid.

FIG. 8 is a simplified block diagram of an apparatus for measuring the volume of a small mold projection according to the present invention.

FIG. 9 is a sectional view of a small mold protrusion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Golf ball 2 Golf ball dimple 3 Measuring means 4 Computing means 5 Stylus contact type measuring instrument 6 Moving means 15 Mold small protrusion 16 Measuring means 17 Computing means 18 Stylus contact type measuring instrument 19 Moving means

Claims (4)

[Claims] 1. An X-coordinate value and a Z-coordinate value are measured when an arbitrary X-axis and a Y-axis which are orthogonal to each other in a plan view of a golf ball dimple to be measured are taken and a Z-axis which is orthogonal to an XY plane in a cross section is taken. Measuring means having a stylus-contact measuring device, a moving means for moving the stylus-contact measuring device of the measuring means in the X-axis direction and the Y-axis direction, and an X-coordinate value measured by the measuring means. The cross-sectional area for each pitch in the X-axis direction is obtained from the Z coordinate value, and this cross-sectional area is multiplied by the amount of one pitch for the measurement in the Y-axis direction to obtain the volume of each small block divided in the X-direction row and the Y-direction row. A calculating means for calculating the volume of the golf ball dimple by calculating the volume of the golf ball dimple. 2. The measuring pitch of the measuring means in the X-axis direction is set to 0.01.
The golf ball dimple volume measuring device according to claim 1, wherein the measuring pitch in the Y-axis direction of the measuring means is 0.01 mm to 0.20 mm. 3. An X-Y axis orthogonal to a plan view of an arbitrary small projecting part of a mold to be measured and an XY section in a cross section.
Measuring means having a stylus contact measuring device for measuring an X coordinate value and a Z coordinate value when a Z axis orthogonal to a plane is taken; and a stylus contact measuring device of the measuring means in the X axis direction and the Y axis. A cross-sectional area for each one pitch measurement in the X-axis direction from the X-coordinate value and the Z-coordinate value measured by the measuring means, and the cross-sectional area is measured by one pitch amount in the Y-axis direction. Calculating means for calculating the volume of each of the small projecting portions by calculating the volume of each small block divided by the X-direction column and the Y-direction column by multiplying Part volume measuring device. 4. The measuring pitch of the measuring means in the X-axis direction is set to 0.01.
4. The volume measuring device for small projecting dies according to claim 3, wherein the measuring pitch of the measuring means in the Y-axis direction is 0.01 mm to 0.20 mm.